How much sun does Marine Naiad need?

Marine Naiad grows best in part shade conditions.

When does Marine Naiad bloom?

Marine Naiad blooms in June, July, August, and September.

Where is Marine Naiad native?

Marine Naiad (Najas marina) is native to AZ, CA, FL, IL and 14 more states, per the World Checklist of Vascular Plants (Kew).

Is Marine Naiad HOA-friendly?

Marine Naiad takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Marine Naiad

Name: Pollinator Patch
Author: Pollinator Patch

Najas marina

Last reviewed: August 2026

Toxicity unknown

Marine Naiad (Najas marina) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.

Light

part shade

Water

high

Size

4"–40" H

Bloom

Jun, Jul, Aug, Sep

Native to

AZ, CA, FL, IL and 14 more states

Before you buy

Your city may pay you to plant this

Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 452 programs across 44 states, each with a link to the provider and the date we last checked it.

Find rebates in your area

Browse plants for this ecoregion

Central California Foothills and Coastal Mountains Central California Valley Central Basin and Range Mojave Basin and Range North American Deserts Chihuahuan Deserts Northern Lakes and Forests North Central Hardwood Forests Southeastern Wisconsin Till Plains Eastern Corn Belt Plains Southern Michigan/Northern Indiana Drift Plains Huron/Erie Lake Plains Southern Coastal Plain Southern Florida Coastal Plain Madrean Archipelago Sonoran Basin and Range Eastern Great Lakes Lowlands Southern California/Northern Baja Coast

Marine naiad is a submerged aquatic plant that grows entirely underwater in lakes, ponds, and slow-moving streams. This annual plant produces small inconspicuous flowers and helps oxygenate water while providing habitat for fish and aquatic wildlife.

In an HOA neighborhood

Marine Naiad takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.

Strictly aquatic plant unsuitable for typical residential landscaping
Requires permanent water feature or pond for survival
Not visible or functional in standard garden beds

Wildlife value

Provides critical habitat and food for waterfowl, fish, and aquatic invertebrates. The submerged foliage offers shelter for young fish and nesting sites for aquatic insects.

Common questions

How much sun does Marine Naiad need?: Marine Naiad grows best in part shade conditions.
When does Marine Naiad bloom?: Marine Naiad blooms in June, July, August, and September.
Where is Marine Naiad native?: Marine Naiad (Najas marina) is native to AZ, CA, FL, IL and 14 more states, per the World Checklist of Vascular Plants (Kew).
Is Marine Naiad HOA-friendly?: Marine Naiad takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.

Native range data from the World Checklist of Vascular Plants (Kew). Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

If something looks wrong

Common plant problems, and what to check first

These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.

See all plant problem guides

Ready to grow Marine Naiad? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.

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